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SDN

Software Defined Network

Zone - upper level:
- VMs are assigned to zones.
- user permissions are applied to zones
- zones are containers of VNets
- zone types:
  - Simple a simple bridge on single Proxmox node - no communication across the cluster.
    - usage: user friendly zone names instead of vmbrX interfaces. But still needs to specify VLAN tag for VLANs.
  - VLAN
    - like above but with VLAN tag assigned
  - QinQ - 802.1Q tunnelling / stacked VLANs / 802.1ad
    - first VLAN tag in L2 frame is a provider / service vlan
    - 2nd VLAN tag in L2 frame is customer tag
  - VXLAN (tech preview)
    - encapsulate L2 frames in L3 UDP packets. To prevent broadcasts it is using BGP to exchange L2 mac addresses.
  - EVPN (tech preview)
VNets - lower